Hey guys, I need help.
I have three classes (Main, Table and ActionListenerWin). I'm using the actionListener in "ActionListenerWin" to call the "Table" class when a button is clicked. Can anybody tell me what I'm doing wrong?
table.addActionListener(new Action1()); // This line is somewhere in the code // Then static class Action1 implements ActionListener{ Table object1 = new Table(); public void actionPerformed(ActionEvent e) { object1.setup(); object1.draw(); } }
Can anybody help me out? I've tried different things but none of them have worked, Do I have to do anything in the main class to make it work? With the code abode I'm getting this nasty error:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at processing.core.PApplet.size(Unknown Source) at processing.core.PApplet.size(Unknown Source) at projectII.Table.setup(Table.java:23) at projectII.ActionListenerWin$Action1.actionPerformed(ActionListenerWin.java:108) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6263) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
I'd be very thankful if you can do anything for me.